Article View: rec.audio
Article #1585Re: Removing noise from cassette recording
From: Rick Sterling - PA
Date: Fri, 08 Dec 1989 13:08
Date: Fri, 08 Dec 1989 13:08
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1690 bytes
In article <116@emdeng.Dayton.NCR.COM> dlundy@emdeng.Dayton.NCR.COM (Dave.Lundy) writes:
> I have been given the task of duplicating a very noisy cassette.
> It was recorded on type I tape with no noise reduction & much too
> low recording level. Can anyone suggest a reasonable way to make
> a copy with less noise. I know that there are a number of programs
> for the Amiga that can digitize & edit audio so I thought maybe one
> of them used some kind of DSP techniques that might be useful in this
> case. Thanks in advance for your suggestions.
>
> Dave Lundy
Unless you have some highly correlated ``noise'' like 60hz hum, DSP techniques
won't help here. You could ``edit'' out the noise between selections and any
clicks or pops, but thermal and 1/f noise added to the program material can
usually only be reduced by analogue low pass filtering.
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Rick Sterling Commodore Technology Group (215)-431-9275
Test Engineering UUCP ...{uunet,allegra,rutgers}!cbmvax!sterling
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!cbmvax!sterling From: sterling@cbmvax.UUCP (Rick Sterling - PA) Newsgroups: rec.audio,comp.sys.amiga Subject: Re: Removing noise from cassette recording Keywords: noise removal, DSP Message-ID: <8884@cbmvax.UUCP> Date: 8 Dec 89 13:08:08 GMT References: <116@emdeng.Dayton.NCR.COM> Reply-To: sterling@cbmvax.UUCP (Rick Sterling - PA) Distribution: na Organization: Commodore Technology, West Chester, PA Lines: 23